Can formulaic expression make the content of the speech sound good? Which of the following aspects?

Formulating can make the content of a speech sound good and easy to remember.

Formula memorization is a method of compiling memory materials into "jingle" or rhyming sentences with homophonic Chinese characters and memorizing them in formula form. This is one of the oldest and most widely used mnemonics. Psychological experiments show that an 80-word ballad can be recited after reading it for 8 times. And the same number of words with incoherent meanings can only be remembered after reading 80 times.

Valence in memory chemistry: We might as well use this formula: univalent potassium sodium silver hydrogen chloride; Bivalent calcium, barium, magnesium and zinc oxide; Tetrasilicon pentavalent phosphorus trialuminum; 23 Iron, 24 carbon and 24 hexavalent sulfur are complete. Memory of the twenty-four solar terms: It can be remembered as follows: Spring rains shake the valley in spring, summer is full and summer is hot, autumn dew and autumn frost fall, and winter snow is snowy.

Preposition used before memorizing English time nouns: in should be used before month, year and week, not before day. When you are dating, in the morning and afternoon. If you want to say a morning and an afternoon, you can only use on for in. It works well at midnight and dusk and at dawn. Before it's too late, you can say "bad", but only "too" in the past. Speak more, practice more and remember. Don't let the years go by.

The formula should be able to grasp the characteristics of the memory material itself and reflect the most important and basic content of the material itself. The formula should conform to your own memory task. The formula itself should be natural, concise, catchy, rhythmic and musical.